Hello @lautobus,
This was a little while ago and I don’t have time to look through everything, but this maybe relevant: block names should not contain an underscore, they should use dashes.
Block names must include only lowercase alphanumeric characters or dashes.
This rule is something built into WP core, and ACF has some code that automatically converts _ to - to avoid the issue.
I.e. carousel_block should be converted to carousel-block.
Hope that is helpful. Thanks.
